Rearrange an array in maximum minimum form | Set 2 ( O ( 1 ) extra space ) | C # program to rearrange an array in minimum maximum form ; Prints max at first position , min at second position second max at third position , second min at fourth position and so on . ; initialize index of first minimum and first maximum element ; traverse array elements ; at even index : we have to put maximum element ; at odd index : we have to put minimum element ; Driver code
using System ; class GFG { public static void rearrange ( int [ ] arr , int n ) { int max_ele = arr [ n - 1 ] ; int min_ele = arr [ 0 ] ; for ( int i = 0 ; i < n ; i ++ ) { if ( i % 2 == 0 ) { arr [ i ] = max_ele ; max_ele -= 1 ; } else { arr [ i ] = min_ele ; min_ele += 1 ; } } } static public void Main ( ) { int [ ] arr = { 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 } ; int n = arr . Length ; Console . WriteLine ( " Original ▁ Array " ) ; for ( int i = 0 ; i < n ; i ++ ) Console . Write ( arr [ i ] + " ▁ " ) ; rearrange ( arr , n ) ; Console . Write ( " STRNEWLINE Modified ▁ Array STRNEWLINE " ) ; for ( int i = 0 ; i < n ; i ++ ) Console . Write ( arr [ i ] + " ▁ " ) ; } }